Window-lock



' R. E; JOHNSON.

WINDOW LOCK. APPLICATION men occ. 1s, ma

Patented Oct. 4, 1921.

I v I 314mm hdiifiwa;

Y the invention is to provide a device of this UNITED STA.

ROLAND E. JOHNSON, 0F MEDFORD, MA SSACHUSETT S.

- A wrNnow-LooK. 7

' 7 Application filed December 1 To allwhomit maycoa'c'e m."

Be it known that I, ROLAND E. JOHNSON, a citizen of the United States,residing at Medford, in the county of Middlesex, State of Massachusettshave iny'ented'a new and useful Window-flock; and I 'do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to an improved sash lock or latch, and one of theobjects of kind, which is simple in construction, effective inoperation, and may be manufactured for a small cost and sold at areasonable profit.

A further object of the invention is to provide a latch having a springtension latch hook supported on the upper rail of the lower sash, andadapted to engage a stationary hook on the lower rail of the upper sash,when the lower sash is lowered;

A further object of the invention is the provision of means carried uponthe lower rail of the upper sashto support the spring tension latch hookfree of the hook of the lower rail of the upper sash, whereb either oneof the sashes may be opened. owever, when either one or both of thesashes are closed the spring tension latch hook will automaticallyengage the stationary hook,

thereby holding both sashes locked when closed.

In practical fields, the details of construction may necessitatealterations falling within the scope of what is claimed.

The invention comprises further features and combination of parts, ashereinafter set forth, shown in the drawings, and claimed.

In the drawings a Figure 1 is a perspective view of the meeting rails ofthe upper and lower sashes, showing the improved sash latch and slide.

Fig. 2 is a vertical sectional view on line 2-2 of Fig. 1, showing indotted lines the spring tensioned latch hook as supported out ofengagement with the stationary hook.

Fig. 3 is a detailed view of the spring tensioned latch hook and aportion of its support, showing the arrangement of the spring.

Referring more especially to the drawings, 1 designates the upper railof a lower window sash, and on the upper face of which, by means ofscrews 2, a bracket 3 Specification of Letters mat.

7 is secured.

is a plate 12,

8, 1 918 Serial No. 267,274.

and is'U-shaped as shown; Mounted in the upper ends of the spacedupstanding arms or sides 5 is a pin or shaft 65 A latch hook 7 ispivotally mounted upon the pin or shaft, there being a spring8 carriedby the pin or shaft and engaging the latch hook for retaining the samein operative position. The lower end of the latch'has a hook portion 9,and projecting laterally from the latch is an arm 10. Secured'by screws11 to the upper face of the lower rail of the upper sash and risingupwardly from the plate is a stationary hook 13, with which the hook 9of the latch 7 engages, when the lower sash is lowered, or when theupper sash is raised to a closed position. Also rising'upwardly from theplate 12 is a flexible lug 14. When it is desired to raise or open thelower sash or lower or open the upper sash, the lateral arm 10 isgrasped, and the latch 7 lifted, sufficiently to permit the arm 10 toengage over the flexible lug 14 and rest in engagement therewith.Obviously the upper sash may then be lowered or the lower sash raised.However, when either one or both of the sashes are closed, the hook 9 ofthe latch 7 will automatically engage the stationary hook 13, therebylocking the two sashes. When the lateral arm 10 is in engagement withthe flexible lug 14, the shoulder 15 of said arm 10 will prevent thelateral displacement of the latch, incident to a pressure that may beapplied to one edge of the latch. -The flexible lug 14 being inengagement with the side of the latch 7 at a point opposite to the sideengaged by the shoulder 15, it will be seen that lateral movement of thelatch 7 in the opposite direction to that set forth above-will beprevented when an instrument is forced upwardly between the rails of thesashes. It is obvious that since the flexible lug is in the path of thearm 10 when the latch 7 is forced upwardly that the hook 9 of the latch7 will when it is forced upwardly come into engagement with the enlargedportions 16 of the flexible lug thereby preventingthe 'raisto flex theflexible lug.

Patented ocaa, 1921.

TEYS PATIENT orrlcnffl This bracket comprisesa base 4, j

The invention having been set forth, what is .claimed as new and usefulis In a window sash latchatheoombination' with a stationary hook on thelower rail of the upper sash, of a spring tensioned latch'= hookpivotally supported on the upper rail of the lower'sash', saids'pringtensioned latch" hook being inclined downwardly and overlying the lowerrail of theupper' sash at an acute angle for engagement with saidStationaryhook when the two sashes areolosed,

hold itshook outof engagement the stationary hook, said lug extendinginto the path of'movementof said arm and adapted to be flexed backthereby on opening or c1osingithe' window, and to spring back into saidpath to hold the latch out of operative positio'n;-' In testimonywhereof I have signed my name to this specification in the presence oftwo subscribing witnesses. g I I c ROLAND JOHNSGN;

Witnesses: V

AR'TH'URF. CLEMENT Q GEoRGEE-SARGENT.

